Sand-screen



(No Model.)

o. MONJBA. SAND SCREEN.

No. 482,020. Patented Sept. 6, 1892.

Nr'rn STATES CLEOPHAS MONJEAU, OF MIDDLETOWN, OHlO.

SAND-SCREEN.

SPECIFICATION forming part of Letters Patent No. 482,020, datedSeptember L6,1892.

Application led September 24, 1891. Serial No. 406,639. (No model.)

.To @ZZ whom, it may concern.-

Be it known that I, CLEoPHAs MONJEAU, a citizen of theUnitedStates,residin g at Middletown, Butler county, Ohio, have invented newand useful Improvements in Sand-Screens, of which the following is aspecication.

My invention relates to sand-screens, and particularly to the class ofscreens in which the screening-apertures are circumferential slitsmadeinatubular body, its object being to produce an inexpensive andefficient screen of novel construction, great capacity, and resistingstrength, one feature of which is of general application as animprovement to screens of the same constructive type to increase thewater capacity.

To this end my invention consists in a sandscreen composed of acylindrical tube of metal, provided interiorly upon its inner peripherywith independent longitudinal supportingribs and having a series ofcircumferential screening-slits cutting through and entirely around thecylindrical shell; and it further consists in a series of longitudinalgrooves sunk partially but not entirely through the tubular bodycrossing the circumferential slits. This latter feature of my inventionmay be employed upon all sand-screens of the general type havingcircumferential slits as an independent feature, while also thefirstmentioned construction may also be used independently of thesecond, although the best results are attained in the use of bothtogether.

Mechanism embodying my invention is illustrated in the accompanyingdrawings, in which- Figure l is an external View of my improved screencomplete; Fig. 2, a perspective view of part of the tubular body,showing the interior construction; Fig. 3, an enlarged detail section inthe plane of one of the horizontal screening-slits; Fig. 4, an enlargeddetail section in the plane of one of the vertical feedgrooves; Fig. 5,an enlarged diagram exhibiting the boundaries of the generalWater-aperture (in an isometric plane) formed by one of thecircumferential slits with its feedgrooves, showing the increasedcapacity. Fig. 6 is a screen embodying my invention of a type in whichthe tubular cross-slitted body is composed of a strip or strips woundspirally consists of a cylindrical shell A', a head or cap A2, and apoint A5. The shell A is a hollow cylinder provided with independentinterior longitudinal supporting-ribs a, which are preferably drawnwiththe tube in the process of manufacture. ToV constitute the screen,continuous circumferential slits b are sawed or cut through thecylindrical shell and partly through the supporting-ribs a, as indicatedin Fig. 3. The intact portions of the ribs constitute a support forthescreen, which still maintains its general f cylindrical form. Thescreening-slits thus made are continuous circumferentially. They may bein parallel planes at right angles to the axis, or a single spiral slitcontinuous throughout. Thus constructed the screen is easily and cheaplymade and is effective for the purpose.

A further feature of my invention consists in increasing thewater-receiving capacity of a screen of this general character asfollows: Across the circumferential slits, however made, is cut a seriesof parallel longitudinal recesses or grooves c, extending into thesurface of the shell, say, to one-half of its thickness. These cross thefirst-named slits b and increase its receiving area, as shown in anisometric plane in Fig. 5. The increase is more perceptible in thosescreens in which the screening-slit widens inwardly, an example of whichis exhibited in Figs. 6 and 7. Here the tubular body of the screen iscomposed of strips of proper section, as d, Fig. 7, wound spirally upona suitable perforated hollow core e,with an intervening perforatedseparatingstrip f. The longitudinal grooves c are cut to the depth ofthe separating-strips, as shown.

As the screening-slits and feed-grooves are exceedingly minute, theyboth serve to screen out the sand and admit the water.

The practical advantge of the improvement will be readily understood ifwe conceive of the water capacity of the screening-slit interfered withby the lodgment of particles of sand at its outer margin too large topass between, but held there by the inner suction and obstructing thefree entrance of water. Now

IOO

shell, leaving the supporting-ribs substantielly intact, substantiallyas set forth.

2. In a sand-screen of the general' type embodying a. tubular shell cutthrough by screenin g-slits, a series of cross-grooves out partiallythrough the shell across the screening-slits, substantially as setforth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

GLEOPI-IAS MONJEAU.

Witnesses:

L. M. HOSEA, E. HosEA.

